In-Service Calibration Interval

Definition

The calibration interval defines how long a dynamometer or force gauge can be used before recalibration. There is no single universal standard — intervals vary by instrument type, application severity, and governing standard. Common practices: mechanical dynamometers used in field tensioning are often calibrated annually; instruments used in safety-critical proof load testing may require calibration every six months or before each use; aviation MRO instruments may be governed by FAA or customer-specific intervals. The calibration interval should account for the frequency and severity of use, shock loading history, and the accuracy requirement of the application.

Frequently Asked Questions

Why In-Service Calibration Interval Matters

An instrument calibrated two years ago and subjected to daily field use may have drifted significantly from its original accuracy — even if it appears physically undamaged. Using an instrument with an expired calibration interval in a compliance-documented operation creates audit risk and potentially invalidates the work record.

How Dynamic Measurement Uses It

DMS offers standard and expedited calibration to support customers managing calibration interval requirements. Their expedited 24–48 hour turnaround is specifically designed for time-sensitive operations where instruments must return to service quickly.

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